|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Material Behavior Characterization via Multi-Directional Deformation of Sheet Metal
||Modeling Anisotropic Hardening and Nonlinear Elasticity under Loading Path Change
||Myoung-Gyu Lee, Jeong-Yeon Lee, F. Barlat, Jinwoo Lee
|On-Site Speaker (Planned)
A distortional hardening approach without kinematic hardening concept is proposed to capture complex flow stress responses under different loading path changes. The proposed model enables to reproduce the Bauschinger effect in metallic materials during load reversal, and the latent hardening and softening under orthogonal loading paths. The model is described in the continuum scale level and FE implementation is made for practical use of commercial software. In terms of the elasticity model for metallic materials under prior plastic deformation, a concept of multiple surfaces is introduced to describe nonlinear and hysteretic elasticity. The anisotropic hardening and nonlinear elasticity models have been validated by different experimental procedures which include two-stage tensile test, loading-unloading-reloading test and simple shear-reverse shear test. Finally, FE simulations of springback and dent resistance of steel sheets are performed and the results are compared to experiments to demonstrate the accuracy and efficiency of the models.
||Planned: A print-only volume